July 07, 2025

"Paper paste" solar cells come out: photoelectric conversion efficiency is not high

"Paper paste" solar cells come out: photoelectric conversion efficiency is not high

A groundbreaking development in renewable energy has emerged from Japan, where a research team has created a new kind of solar cell made from wood pulp. Dubbed "paper-paste" solar cells, these devices are lightweight, flexible, and eco-friendly, offering a promising alternative for future energy solutions.

According to a report by the Japanese website Daily News, the project was led by Associate Professor Nobuya Nobuta from Osaka University's Institute of Industrial Science. The team used plant fibers found in wood pulp to create a transparent material just 15 nanometers thick through a compression process. This material serves as the base for the solar cell, allowing organic materials and wiring to be embedded using pressure, resulting in a thin and versatile solar panel.

Although the current photoelectric conversion efficiency of these "paper-paste" solar cells is only around 3%, which is lower than the typical 10% to 20% seen in conventional solar panels, their advantages lie in their portability, ease of use, and extremely low production costs. Unlike traditional silicon-based solar cells, these paper-like panels could be easily integrated into everyday objects or even used in remote areas where traditional solar panels might not be practical.

The technology is still in its early stages, but it opens up exciting possibilities for the future of sustainable energy. With further research and development, it’s possible that this innovative approach could one day become a mainstream solution for clean power generation.

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